Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning
ISBN 10: 1285199049
ISBN 13: 978-1-28519-904-7

Chapter 8 - Properties of Gases - Conceptual Exercise 8.8 - Comparing Densities - Page 338: a


Density of He = 0.000166 g/mL, density of Lithium = 0.53 g/mL. These densities reflect that atoms of He gas are spread in far greater area as compared to that of Lithium, whose atoms are closely packed. This also proves the Kinetic molecular theory, according to which most of he area of gas is empty space and there is a large distance between the atoms.

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